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4 E 73rd St, New York, NY, 10021

5beds
10baths
8,360sqft
$25,750,000
$3,080price/sqft
$150,475/moest. monthly cost
$6,019,000/yrincome needed

About This Home

A masterpiece of scale, design, and craftsmanship, this extraordinary 22.5-foot-wide mansion is perfectly situated on one of the Upper East Side’s most desirable blocks, just off Fifth Avenue and Central Park. Designed by renowned architect Alan Wanzenberg and executed to the highest standards by Steve Mark of SMI Construction Management Inc., the home reflects an impeccable level of detail, marrying timeless elegance with contemporary functionality. The property is located in a historic landmark district and is protected against vertical expansion.  Comprising five stories plus a finished basement with approximately 8,360 square feet of interior space, the residence is complemented by 1,526 square feet of private outdoor spaces, including a south-facing 660-square-foot garden with an outdoor fireplace and built-in grill, and an 866-square-foot landscaped roof terrace with views of the iconic Manhattan skyline. Inside, the home is defined by high ceilings up to 10'8", abundant natural light, and grand proportions. The spectacular entertaining rooms include a 32-foot-long living room overlooking the beautiful tree-lined street, an elegant formal dining room, a richly appointed library with a wood-burning fireplace, and a custom eat-in kitchen opening onto the garden with a second wood-burning fireplace. The kitchen is outfitted with appliances by Sub-Zero, Viking, and Gaggenau, blending everyday function with chef-level performance. There are five oversized bedroom suites, six luxurious full bathrooms, and four powder rooms. In addition, there is a full ensuite staff bedroom on the garden level. Finishes throughout include solid-core walnut doors and millwork, as well as custom windows by Little Harbor Window, underscoring the residence’s level of craftsmanship. A dramatic skylight crowns the top of the home, flooding the grand staircase and interior spaces with natural light, while western side windows further enhance brightness on every floor. All systems have been fully modernized, including an elevator serving the basement to the fifth floor, an eleven-zone central air system, an automatic irrigation system, a Crestron full house system, Lutron lighting and intercom. A true Manhattan mansion, 4 East 73rd Street presents a rare opportunity to acquire one of the city’s most distinguished private residences.

Getting Around

93
WalkingWalker's Paradise
100
TransitRider's Paradise
75
BikeVery Bikeable

Schools

8/10
Ps 6 Lillie D BlakeGrades PK-50.4 mi
8/10
Jhs 167 Robert F WagnerGrades 6-80.4 mi
6/10

Construction

Condition

  • Year built: 1910

Type & Style

  • Home type: SingleFamily
  • Property subType: Single Family Residence

Interior

Appliances

  • Appliances included: Dishwasher,Washer/Dryer
  • Laundry features: Inside

Bedrooms & Bathrooms

  • Bedrooms: 5
  • Bathrooms: 10
  • Full bathrooms: 6
  • 1/2 bathrooms: 4

Cooling

  • Cooling features: Central Air

Features

  • Flooring: Hardwood
  • Fireplace features: Decorative,Wood Burning
  • Fireplace: Yes

Interior Area

  • Total structure area: 8,360
  • Total interior livable area: 8,360 sqft

Property

Details

  • Parcel number: 013870067
  • Special condition: Resale

Features

  • Patio & porch: Deck,Other
  • Exterior features: Garden,Private Roof Deck

Climate Risk is Financial Risk

Every home has a financial story beyond the listing price. Below, you’ll see the climate risks that could affect this property — and in Bills & Affordability, how those risks may influence repairs, insurance, utilities, and long-term value.

Biggest Threats for This Home

  • Cold Wave
    Cold WaveModerate
  • Earthquake
    EarthquakeModerate
  • Hurricane
    HurricaneModerate
  • Heat Wave
    Heat WaveModerate
  • Inland Flooding
    Inland FloodingModerate
  • Strong Wind
    Strong WindModerate
  • Winter Weather
    Winter WeatherModerate
  • Tsunami
    TsunamiInsufficient Data

How This Home’s Risks Compare

Cold Wave
Earthquake
Hurricane
Heat Wave
Inland Flooding
Strong Wind
Winter Weather
Tsunami

FEMA Declared Disasters in New York County and New York

Flood
Severe Storm

Understanding the Costs

Financial advisors generally recommend spending no more than 30% of your gross household income on housing costs. In practice, many households stretch to 35% or beyond — especially in high-cost markets.

Estimated Costs Today

MonthlyAnnual
Mortgage $130,206$1,562,472
Home Insurance *$3,653$43,836
Property Taxes $15,235$182,820
Electricity $1,381$16,578
Total$150,475$1,805,700
*Does not include cost of any FAIR Plan premiums

Income You'd Need if You Spent...

35% on housing$5,159,142/yr
40% on housing$4,514,250/yr
45% on housing$4,012,666/yr

New York FAIR Plan Programs

New York Property Insurance Underwriting Association

Covered
WildfireWildfire
HailHail
WindWind
Visit Website →
Current Policies
Residential: 20,669Commercial: 1,556
Total Premiums$32.27M
Total Exposure$7.63B

How Costs Could Change Over Time

Climate risk is quickly impacting all of the major home ownership costs. Adjust the growth rates and percentage of income spent on housing below to see how your housing costs could change over the next 10 years — and what income you'd need to keep up.

Insurance Growth Rate5-year average: 2.0%
2.0%
0%30.0%
Electricity Growth Rate10-year average: 7.1%
7.1%
0%15.0%
Property Taxes Growth Rate2-year average: 1.0%
1.0%
0%15.0%
Income Spent on Housing
30%
30%45%

Comparing Against the Market

Price Per Sq Ft

$3,080This listing

vs Other Active Listings

Avg $/sqft

ZIP 10021$3,132
New York County$1,488

vs Homes Sold Last Month

Median $/sqft

ZIP 10021$1,696
New York County$1,203

Current Market Trends

Median Price Per Square Foot

The median price per square foot of homes sold in this area each month. Compare this to this listing's price per square foot to gauge whether the home is priced in line with recent sales.

Historicals for This Listing

Zestimate History ($/sqft)

Price History

DateEventPrice
2026-04-29Price change$25,750,000
2025-09-17Listed for sale$28,000,000
2004-04-01Sold$6,000,000

For Sale by Agent

AgentCathy Franklin
BrokerageCorcoran

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